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Related Concept Videos

Portal Hypertension01:22

Portal Hypertension

Portal hypertension is an increase in blood pressure within the portal venous system. Normally, this pressure is less than 5 mmHg. It is considered clinically significant when it rises above 10 mmHg. At this threshold, complications from altered blood flow and venous congestion emerge.EtiologyPortal hypertension arises from conditions that impede blood flow through the liver. The most common cause is cirrhosis, in which chronic liver injury leads to fibrotic scarring. This fibrosis narrows or...
Hepatic Portal System01:21

Hepatic Portal System

The hepatic portal system, a critical part of our circulatory framework, transports nutrient-laden, deoxygenated blood from the gastrointestinal tract and spleen to the liver. This ingenious system plays an indispensable role in maintaining our body's metabolic equilibrium.
At its core, the hepatic portal vein is the result of a confluence of the superior and inferior mesenteric veins along with the splenic vein. Each of these veins has a unique role. The superior mesenteric vein is responsible...
Methods of Documentation VI: Case Management Model01:15

Methods of Documentation VI: Case Management Model

The case management model is a multidisciplinary approach that involves healthcare professionals from diverse disciplines, such as physicians, nurses, therapists, social workers, and pharmacists, working collaboratively to address the various needs of patients. Each healthcare professional brings unique expertise and perspectives, contributing to a more comprehensive understanding of the patient's condition and tailoring treatment plans accordingly.
For example, a patient with a chronic illness...
Methods of Documentation II: POMR01:26

Methods of Documentation II: POMR

The Problem-Oriented Medical Record (POMR) revolutionized medical record-keeping by introducing a systematic approach focusing on the patient's problems rather than merely listing symptoms. Dr. Lawrence Weed's introduction of this method in the 1960s marked a significant advancement in medical documentation. The POMR framework consists of four key components: the database, problem list, plan of care, and progress notes.

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Related Experiment Video

Updated: Jun 23, 2026

Invasive Hemodynamic Characterization of the Portal-hypertensive Syndrome in Cirrhotic Rats
09:37

Invasive Hemodynamic Characterization of the Portal-hypertensive Syndrome in Cirrhotic Rats

Published on: August 1, 2018

A methodology for improving throughput using portal monitors.

Gary H Kramer1, Kevin Capello, Barry Hauck

  • 1National Internal Radiation Assessment Section, Radiation Protection Bureau, Health Canada, Ottawa, ON, Canada. gary_h_kramer@hc-sc.gc.ca

Radiation Protection Dosimetry
|April 23, 2009
PubMed
Summary
This summary is machine-generated.

This study introduces group monitoring to rapidly screen large numbers of people for internal radiation contamination using portal monitors. This method significantly reduces transit times and speeds up emergency response assessments.

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Monitoring of Systemic and Hepatic Hemodynamic Parameters in Mice
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Area of Science:

  • Nuclear Science and Engineering
  • Radiation Protection
  • Public Health Emergency Preparedness

Background:

  • The National Internal Radiation Assessment Section (NIRAS) uses portal monitors for emergency screening of potentially contaminated individuals.
  • Existing portal monitor types have limitations, including false alarms at distance or background interference, impacting screening efficiency.

Purpose of the Study:

  • To propose and evaluate a group monitoring method to enhance the speed and efficiency of screening large populations with portal monitors during emergencies.
  • To reduce transit times and optimize personnel deployment for field-deployable radiation assessment equipment.

Main Methods:

  • Implementing a group monitoring strategy where individuals are screened in batches away from portal stations.
  • Utilizing real-time contamination estimates to select screening groups and the hypergeometric distribution to determine optimal group sizes.
  • Estimating transit times and personnel requirements for efficient operation of field equipment.

Main Results:

  • The proposed group monitoring method is anticipated to significantly reduce processing and transit times for individuals.
  • The hypergeometric distribution aids in selecting sampling group sizes to minimize the likelihood of including contaminated individuals in initial screening groups.
  • Estimates for transit times and personnel needs are provided to support operational planning.

Conclusions:

  • Group monitoring offers a viable strategy to accelerate the screening of large numbers of people for internal radiation contamination.
  • This approach enhances the effectiveness of emergency response capabilities by optimizing the use of portal monitors and associated equipment.
  • Efficient screening is crucial for rapid public health decision-making during radiological or nuclear incidents.